Number of regex matches

Question

I\'m using the finditer function in the re module to match some things and everything is working.

Now I need to find out how many matches

Answer 1

For those moments when you really want to avoid building lists:

import re
import operator
from functools import reduce
count = reduce(operator.add, (1 for _ in re.finditer(my_pattern, my_string))) 

Sometimes you might need to operate on huge strings. This might help.